//链接消息
/*
$xml_file = '<xml>
<ToUserName><![CDATA[toUser]]></ToUserName>
<FromUserName><![CDATA[fromUser]]></FromUserName>
<CreateTime>1351776360</CreateTime>
<MsgType><![CDATA[link]]></MsgType>
<Title><![CDATA[公众平台官网链接]]></Title>
<Description><![CDATA[公众平台官网链接]]></Description>
<Url><![CDATA[url]]></Url>
<MsgId>1234567890123456</MsgId>
</xml>';
*/
$arr_data = array();
$arr_data['action'] = 'receive_msg';
$arr_data['msg'] = $obj_weixin->iconv_charset($xml_file, "GBK", 'UTF-8');
//$arr_data['msg'] = $xml_file;
//$arr_data['msg'] = parse_str(file_get_contents('php://input'), $_POST);
$arr_result = $obj_weixin->weixin($arr_data);
echo '<pre>';
print_r($arr_result);
echo '</pre>';
//exit;
if ($arr_result['MsgType'] == 'text') {
//发送被动响应消息
$arr_data = array();
$arr_data['action'] = 'send_msg';
$arr_data['ToUserName'] = $arr_result['ToUserName'];
$arr_data['FromUserName'] = $arr_result['FromUserName'];
$arr_data['CreateTime'] = $arr_result['CreateTime'];
$arr_data['MsgType'] = $arr_result['MsgType'];